77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
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package canvas
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import (
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"image/color"
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"fyne.io/fyne/v2"
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)
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// Declare conformity with CanvasObject interface
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var _ fyne.CanvasObject = (*Text)(nil)
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// Text describes a text primitive in a Fyne canvas.
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// A text object can have a style set which will apply to the whole string.
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// No formatting or text parsing will be performed
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type Text struct {
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baseObject
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Alignment fyne.TextAlign // The alignment of the text content
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Color color.Color // The main text draw color
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Text string // The string content of this Text
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TextSize float32 // Size of the text - if the Canvas scale is 1.0 this will be equivalent to point size
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TextStyle fyne.TextStyle // The style of the text content
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}
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// Hide will set this text to not be visible
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func (t *Text) Hide() {
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t.baseObject.Hide()
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repaint(t)
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}
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// MinSize returns the minimum size of this text object based on its font size and content.
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// This is normally determined by the render implementation.
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func (t *Text) MinSize() fyne.Size {
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return fyne.MeasureText(t.Text, t.TextSize, t.TextStyle)
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}
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// Move the text to a new position, relative to its parent / canvas
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func (t *Text) Move(pos fyne.Position) {
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t.baseObject.Move(pos)
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repaint(t)
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}
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// Resize on a text updates the new size of this object, which may not result in a visual change, depending on alignment.
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func (t *Text) Resize(s fyne.Size) {
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if s == t.Size() {
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return
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}
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t.baseObject.Resize(s)
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Refresh(t)
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}
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// SetMinSize has no effect as the smallest size this canvas object can be is based on its font size and content.
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func (t *Text) SetMinSize(fyne.Size) {
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// no-op
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}
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// Refresh causes this text to be redrawn with its configured state.
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func (t *Text) Refresh() {
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Refresh(t)
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}
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// NewText returns a new Text implementation
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func NewText(text string, color color.Color) *Text {
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size := float32(0)
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if fyne.CurrentApp() != nil { // nil app possible if app not started
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size = fyne.CurrentApp().Settings().Theme().Size("text") // manually name the size to avoid import loop
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}
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return &Text{
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Color: color,
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Text: text,
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TextSize: size,
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}
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}
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